Signals of supersymmetry in top quark decays at positron-electron and hadron-hadron colliders
Haim, Dan
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/21442
Description
Title
Signals of supersymmetry in top quark decays at positron-electron and hadron-hadron colliders
Author(s)
Haim, Dan
Issue Date
1990
Doctoral Committee Chair(s)
Jones, Lorella M.
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Elementary Particles and High Energy
Language
eng
Abstract
As the search for 'new physics' intensified in the past decade, phenomenological consequences of non-standard theories, such as supersymmetry, became highly important to the future of high energy physics. We examined the possibility of detecting supersymmetry in existing and future $e\sp+ e\sp-$ and hadron-hadron colliders. We have focussed on the influence of supersymmetry on the search for the top quark (as yet, undiscovered) by studying the two specific processes: $e\sp+ e\sp-$ $\to$ $\Theta$ $\to$ $g\tilde{g}\tilde{k}$, where $\tilde{k}$ is either a $\tilde{g}$ or $\tilde{\gamma}$, and $pp \to$ $t\bar{t}X$ followed by $t$ $\to$ $b+l\sp{+}+\nu\sb{\rm l}+\tilde\gamma+\tilde\gamma$. The Webber Marchesini Monte Carlo programs, EARWIG and HERWIG, were used to generate 1000 events of each type at center of mass energies of 2$m\sb{\rm t}$ for the $e\sp+ e\sp-$ machines, and 40 TeV, for the SSC, respectively. We find that although it is possible to observe supersymmetry, we need machines of higher luminosity to detect it. We also find that there is a major background in the hadron-hadron colliders (both the Tevatron and the SSC) from the initial state bremsstrahlung radiation which, at top quark mass of 100 GeV, can obscure the true nature of the jets from the hard subprocess itself.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
